Sorry Marian... haven't had a litter from them yet, but I've read that only the fresh Alaskan air can help intensify blue coloration. Why don't you send up a batch, and I'll let you know if it works?
Actually, I've read that the color on these Pugets also intensifies with age. I think S. Felzer made that claim on one of his ads last year. I believe it was an ad on FaunaClassifieds.
Rick